Hello there. No, it doesn't sound crazy - it sounds NORMAL under the circumstances. It all sounds perfectly normal for a person who has experienced attachment trauma (just as a start - you almost certainly have experienced other forms of trauma, but attachment/relational trauma is definitely one of them). It all sounds perfectly normal for someone at your stage of healing when the therapist, the healing attachment figure, has suddenly left you and then - in changing the parameters of the texting - has suddenly left you AGAIN. In this context, all the fear and pain and anguish and hopelessness you and your parts are experiencing is perfectly normal. The reactions are typical and almost expected in this scenario. This is all to assure you that you are definitely not "crazy". But you definitely are traumatized, and you definitely are suffering.
To all those little ones in there... T is coming back. T has not abandoned you. T has had something come up (surgery) and he needs to take care of himself until he can come back to you again. You are not bad for wanting and needing him. You are not bad or awful for reaching out to him. He is not rejecting you or pushing you away - he is just taking really good care of himself. He is not there for you right now and it hurts like heck. But T IS going to come back. He is not going to abandon you. He does not think you are awful. He is taking very good care of himself so he can come back and be fully healed and ready to support you again. He is doing what most therapists do in that situation... it isn't unusual for them to go no contact when dealing with hard stuff. It really isn't a rejection of you, it is just him taking the very best care of himself.
T will come back. He will get better and then he will come back.
In the meantime, what can you all do to help you? Who can look after those little ones and reassure them that they are good they are worthy, they are safe? What can you do to help them feel safe? Do they have special toys you have bought for them, or do they like special comfort food or blankets? Do they have a pet they can cuddle? What little things can you do that will make even the tiniest difference for them?
Take care. T will come back when he has recovered. While T is taking care of him, do lots of little things to take care of you. Then when T has recovered, he will be back in his office again.
He will come back.